Improvement in railway-rah, chairs



Map2.

NtPETERS. PHOTO-LITHQGRAPHER, WASHINGTON. D. l)A

SAMUEL HULBERT SMITH, or 4ALTooNA1 PENNSYLVANIA.

Lena-8 Patent No. 105,504, dated July 19, 1870.

' mpnovmmnr IN RAILWAY-Ren. CHAIRS.

The Schedule referred to in `there Letters Patent and making part of the :mmfn

To all whom it may concern Beit known that I, SAMUEL HULBEnr SMrrmof Altoona, in the county of Blair and State of Pennsylvania, have inventedl anew and improved. StopfGhair; and I dohereby'declare that the followingis a full, clear, and exact description thereof', which will enable others sklledlin the artto make and use the same, reference being had to the accompanying drawing forming part of this specification.

This invention relates `to improvements in stopy chairs, for employment in connection with railroad rails, to prevent end movement of the same under the action i' the driving-wheels of the locomotives.

The invention consists in'chairs formed of short, narrow plates of `iron or steel, twisted spirally between the ends,` and shaped so that, while one end lies fiat upon the tie, Vso asto be spiked thereon by the side of the rail, the other end will iit against the'side of the rail, at some distance from the tie, at an acute angle with the rail, whereby, being bolted to it, the tendency of the rail to move, acting on the holding-spike in a" line parallel with the rail, or nearlyso, will' be morev easily overcome by one bolt thanl by two bolts in the istoIiJ-chairs now used, as rhereinafter more fully spec' e .l Figure 1 is a plan view of' my improved stop-chair applied to a r'ail and tie, the rail being partly sectioned, and both the rail and tiebeing shown in dotted lines.

Figure 2 is a side elevation of the stop-chair.v

Similar letters of reference indicate V'corresponding parts. p A represents -the stop-chair, consisting-of narrow plate of metal, twisted about a quarter of. a turn between the ends, as shown at B, to rise lup over the base when one end, C, rests on the tie D, and support the other end against-the web of the rail, between the base and the tread, or against the side of the sh-plate, at a suitable distance along' the rail beyond the tie, so that,`when bolted to the railA or fish-plate, the force having the tendency to move the rail endwise will be Ydelivered on the stop-chair nearly inl thel same direci I tion, and similarly en the spike E, but 'transversel y on the tie. l `The stop-chairs now used are made broad at the end resting 'on'the tie, and have two spikes for attach `ing them thereto. They riseup against the rail directly in the transverse linethereot', so that' the endwise force of the rail on the chairs causes them to act on the spikes as a lever, being turned 'aronnd a point between the two spikes as a center, the effectoi' which is to make the action on the spikes much greater than when delivered in the line parallel, or nearly so, with the' rail, as in iny improved arrangement, thereby foreing the spikes alternately back and forth,'and elongating the upper part ofthe holes in the ties by gradually forcing .the walls back, ultimately working the spikes loose. i

Moreover, the movement yof the rail lengthwise will 'begreater with a given amount of space vin the holes for the spikes to move in, in the old arrangement, than in mine; for while in my arrangement themovem'ent `of the rail Vmust be limited tothe amount of the movethe rails with one spike than the chairs now used do `with two.

Having th us described my invention,

I claim as new and desire to secure byLetters Patent- Stop-chairs A, formed of short,narrow Vplates of metal, twisted spirally at B, to enable one end to be spiked flat upon the tie, while the other end is bolted to the rail at some distance therefrom, as shown in thedrawing, and for the purpose specified.

Witnesses: SAMUEL H. SMITH A. MeGoRMIcK, J As.' H. DYSART. 

